CN203442810U - High-low-speed pulverized coal burner used for W-shaped flame boiler - Google Patents
High-low-speed pulverized coal burner used for W-shaped flame boiler Download PDFInfo
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- CN203442810U CN203442810U CN201320500013.6U CN201320500013U CN203442810U CN 203442810 U CN203442810 U CN 203442810U CN 201320500013 U CN201320500013 U CN 201320500013U CN 203442810 U CN203442810 U CN 203442810U
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- pulverized coal
- flow
- burner
- low
- coal burner
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Abstract
The utility model relates to a high-low-speed pulverized coal burner used for a W-shaped flame boiler. The tail end of the pulverized coal burner is connected with a hearth of the W-shaped flame boiler. The pulverized coal burner comprises a wind power airflow channel, a flow-guiding bluff body, a wing-shaped flow-guiding tooth and a burner nozzle. The flow-guiding bluff body is connected with the wind power airflow channel via a connection fin. The tail end of the wind power airflow channel is provided with the wing-shaped flow-guiding tooth. The high-low-speed pulverized coal burner used for the W-shaped flame boiler has following beneficial effects: separation effect that concentration of pulverized coal is low in center and is high on the periphery is fulfilled at the nozzle part of the same burner; a spraying jet field in which airflow speed is high in the middle and is low on the periphery is realized; the flowing manner of a wind powder airflow is conducive to ignition of a pulverized coal air flow and rigidity of the wind power airflow is ensured; with the high-low-speed pulverized coal burner, present pulverized coal boilers at power stations are easily realized and especially improvement on the W-shaped flame boiler is made; and the problem that the conventional pulverized coal burner is unstable in ignition and insufficient in rigidity of jet flow is resolved.
Description
Technical field
The utility model relates to a kind of coal burner, particularly relates to a kind of high low speed coal burner for W flame boiler.
Background technology
Coal burner is the capital equipment of pulverized-coal fired boiler, its effect does not still spray into burner hearth by coal dust with the air-flow (both are referred to as wind powder air-flow altogether) that carries coal dust and burns, and need to organize wind powder air-flow to spray into the form of burner hearth, coal dust with carry the air-flow of coal dust at the distributional pattern of nozzle.The quality that wind powder air-flow sprays into burner hearth form directly affects catching fire and steady combustion of pulverized coal particle in wind powder air-flow.Tradition coal burner generally sprays into burner hearth by wind powder air-flow with the form of single stream.Pulverized coal particle catch fire need to by with stove in carry out radiation and heat convection, first the pulverized coal particle of wind powder air-flow outside catches fire so often, and then the inner pulverized coal particle that ignites.Affecting the pulverized coal particle very important factor of catching fire is wind powder air velocity and coal powder density wherein, reduces wind powder air velocity and improves coal powder density and can promote catching fire of pulverized coal particle.But the reduction of air velocity can bring the deficiency of jet rigidity, particularly using on meager coal inferior and anthracitic W type flame boiler, although reducing wind powder air velocity is conducive to catch fire, but because of its rigidity deficiency, under to penetrate the degree of depth inadequate, cause coal dust stroke to shorten, finally cause the problems such as fly ash combustible material rising, boiler efficiency reduction, so the stable ignition of wind powder air-flow and jet rigidity are conflicts.Meanwhile, the average coal powder density in wind powder air-flow is again because the reasons such as equipment are difficult to change.Therefore, need to take means to organize wind powder air-flow to spray into the form of burner hearth, under the constant prerequisite of wind powder air-flow total amount, make wind powder air-flow have again enough jet rigidity by stable ignition.
Summary of the invention
The purpose of this utility model is to overcome the shortcoming of above-mentioned prior art, provides a kind of and can either realize the high low speed coal burner for W flame boiler that stable ignition can guarantee again jet rigidity.
For achieving the above object, the technical solution adopted in the utility model is: comprise breeze airflow passage and be arranged on the pure body of water conservancy diversion in breeze airflow passage by connection fin, in the breeze airflow passage of the pure body of water conservancy diversion rear end, be also provided with aerofoil profile water conservancy diversion tooth, the burner nozzle of described breeze airflow channel end is connected with burner hearth.
The described pure body of baffle, the aerofoil profile water conservancy diversion tooth that are arranged in breeze airflow passage are all coaxially installed with breeze airflow passage.
The utility model, under the constant prerequisite of wind powder air-flow total amount, sprays into the form of burner hearth by rationalization's wind powder air-flow, at same burner nozzle place, realize the deep or light separating effect that coal powder density center is light, surrounding is dense, to be conducive to heat coal dust, it is caught fire; Realize the high low speed injection stream field that air velocity center is high, surrounding is low simultaneously, effectively improve wind powder air-flow rigidity, finally solve the contradiction that wind powder air-flow should stable ignition guarantees jet rigidity again.
Accompanying drawing explanation
Fig. 1 is overall structure schematic diagram of the present utility model.
The specific embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail.
Referring to Fig. 1, the utility model comprises breeze airflow passage 1 and is coaxially arranged on the pure body 2 of water conservancy diversion in breeze airflow passage 1 by connection fin 3, in the breeze airflow passage 1 of the pure body of water conservancy diversion 2 rear ends, be also provided with aerofoil profile water conservancy diversion tooth 4, the burner nozzle 5 of described breeze airflow passage 1 end is connected with burner hearth 6.
The course of work of novel burner provided by the utility model is as follows:
From wind powder air-flow the stopping because of water conservancy diversion bluff body 2 of an airduct, wind powder Diffusion of gas stream is to the surrounding of gas channel 1, because of pulverized coal particle inertia larger, and gas inertia is less, therefore along with wind powder air-flow further flowing at gas channel, gas diffuses to the center of gas channel 1 gradually again, and most of pulverized coal particle still flows in the surrounding of gas channel 1, this coal powder density that just formation center is light in gas channel 1, surrounding is dense distributes, form center wind speed high, the gas flow distribution that surrounding wind speed is low simultaneously.Wind powder air-flow is after gas channel 1 end aerofoil profile water conservancy diversion tooth 4, because aerofoil profile water conservancy diversion tooth further occupies the space of gas channel 1 surrounding, make gas channel 1 surrounding thick coal culm further concentrated, finally at burner nozzle 5 places, form the wind powder gas flow shape that the light surrounding in coal powder density center is dense, the high surrounding in gas flow rate center is low.
The utility model is by increasing water conservancy diversion bluff body 2, aerofoil profile water conservancy diversion tooth 4, and under the constant prerequisite of wind powder air-flow total amount, the breeze airflow of realizing the low flowing velocity of the high coal powder density of coal burner nozzle surrounding, the high flowing velocity of the low coal powder density in center distributes form.So, guaranteed that in the wind powder air-flow of burner nozzle exit surrounding lower flow velocity, higher coal powder density and burner hearth, high-temperature flue gas carries out radiation, heat convection, to improve the combustion stability of pulverized coal particle; Meanwhile, the high-speed jet at center, burner nozzle place has also guaranteed maintaining whole wind powder gas flow jet rigidity.
The utility model is divided into the wind powder air-flow of the same passage of burner of flowing through in the air-flow of the different flowing properties of inside and outside two circle, solved wind powder air-flow should stable ignition the contradiction of jet rigidity between strong again, be conducive to catching fire of pulverized coal particle, also increased the time of staying of pulverized coal particle in stove, finally can reduce unburned carbon in flue dust, improve boiler efficiency.Owing to having realized the bias combustion of coal dust in burner outlet one segment distance, to a certain degree playing the effect that reduces boiler NOx simultaneously.
Claims (2)
1. the high low speed coal burner for W flame boiler, it is characterized in that: comprise breeze airflow passage (1) and be arranged on the pure body of water conservancy diversion (2) in breeze airflow passage (1) by connection fin (3), in the breeze airflow passage (1) of the pure body of water conservancy diversion (2) rear end, be also provided with aerofoil profile water conservancy diversion tooth (4), the burner nozzle (5) of described breeze airflow passage (1) end is connected with burner hearth (6).
2. the high low speed coal burner for W flame boiler according to claim 1, is characterized in that: the described pure body of baffle (2), the aerofoil profile water conservancy diversion tooth (4) that are arranged in breeze airflow passage are all coaxially installed with breeze airflow passage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320500013.6U CN203442810U (en) | 2013-08-15 | 2013-08-15 | High-low-speed pulverized coal burner used for W-shaped flame boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320500013.6U CN203442810U (en) | 2013-08-15 | 2013-08-15 | High-low-speed pulverized coal burner used for W-shaped flame boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203442810U true CN203442810U (en) | 2014-02-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320500013.6U Expired - Lifetime CN203442810U (en) | 2013-08-15 | 2013-08-15 | High-low-speed pulverized coal burner used for W-shaped flame boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203442810U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111237750A (en) * | 2020-02-12 | 2020-06-05 | 上海电力大学 | Thick-thin burner |
| CN111237751A (en) * | 2020-02-18 | 2020-06-05 | 上海电力大学 | A dense-thin separator for reducing nitrogen oxide discharges |
| CN111520710A (en) * | 2020-05-07 | 2020-08-11 | 李倩 | Pulverized coal burner for high-efficiency boiler |
-
2013
- 2013-08-15 CN CN201320500013.6U patent/CN203442810U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111237750A (en) * | 2020-02-12 | 2020-06-05 | 上海电力大学 | Thick-thin burner |
| CN111237751A (en) * | 2020-02-18 | 2020-06-05 | 上海电力大学 | A dense-thin separator for reducing nitrogen oxide discharges |
| CN111520710A (en) * | 2020-05-07 | 2020-08-11 | 李倩 | Pulverized coal burner for high-efficiency boiler |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140219 |